D12.8 - Concurrent Charge Distribution and Time-Optimal Control for Unordered Single-Inductor Dual-Output Converter

Thursday, March 20, 2025

11:30 AM – 1:30 PM ET

Location: Level One, Hall A3

Technical Dialogue Presenter(s)

Xuliang Wang (he/him/his)

Tsinghua University

Presentation Paper

Co-Author(s)

Haoyu Wang

Tsinghua University
YL

Yang Liu

The Hong Kong University of Science and Technology
YW

Yunxin Wang

Tsinghua University
BZ

Boran Zhang

Tsinghua University
HL

Hongru Liu

Tsinghua University
YW

Yan Wang

Tsinghua University
XL

Xiaosen Liu

Tsinghua University

Charging sequence re-ordering has emerged as a promising technique for mitigating last-channel cross regulation (CR) in single-input multiple-output (SIMO) converters [1][2]. However, conventional unordered control techniques introduce unwanted preceding-channel cross regulation issues. The root cause is the response mismatch between the peak-current (PC) control loop for the half-bridge and the channel-wise charge-based loop [2]. Although response mismatches can be alleviated through real-time calibration, significant CRs still occur during load transients with extreme channel discrepancies and hinder practical applications. To address these limitations, we introduce a calibration-free concurrent charge distribution and time-optimal control (CCD-TOC) technique. Moreover, a comparative study with ordered charge distribution has been conducted to explore the stability boundary of the proposed CCD-TOC technique. Experiment results of the single-inductor dual-output (SIDO) prototype demonstrate a transient CR of 0.176 mV/mA and a 92-mV (3.1 %) undershoot against a 500-mA load step and a 400-mA (66.7 %) channel discrepancy.